"Intel is pleased to announce the BIOS Implementation Test Suite, a bootable pre-OS environment for testing BIOSes and in particular their initialization of Intel processors, hardware, and technologies. BITS can verify your BIOS against many Intel recommendations. In addition, BITS includes Intel's official reference code as provided to BIOS, which you can use to override your BIOS's hardware initialization with a known-good configuration, and then boot an OS."

A number of OS developers who've lived in hatred of the thing for decades disagree with that.
Gee, a bootloader that allows one to completely customise the boot process and replace behaviour set by the vendor of your motherboard... yeah, that sounds completely useless.